Refrigerating apparatus.



No. 871,325. PATENTED NOV. 19, 1907.

c. J. COLEMAN. RBFRIGERATING APPARATUS.

AIPLIOATIOI FILED OCT-1. 1902.

2 SHEETB-SKERT 1.

INVENTOR No. 871,325. PATENTED NOV. 19, 1907.

0. J. COLEMAN. I

REFRIGERATING APPARATUS.

APPLICATION FILED OUT. 1. 1902.

2 8HEBTBSHEHT 2.

WITNESSZZ I I INVENTOR yogdfiv BY WTORNEY CLYDE J. COLEMAN, NEW YORK, N. Y.

REFRIGEBATiNG arrana'rus.

To all whom it may concern."

Be it known that I, CLYDE J. COLEMAN, a citizen of the United States, residing at the borough of Manhattan, city of New York, in

the county of New York and State of New York, have invented certain new and useful Improvements in Refrigerating Apparatus,

' of which the following is a specification, reference being had therein to the accompanyin drawing.

y invention relates to refrigerating apparatus and more particularly to means for utilizing a motive medium in the production of a re rigerating action and for, controlling the supply of such medium to dynamic expanding meansand for giving. an alarm in v the event .of the checking or stoppage or other retardation of the ilow of medium through the refrigerating apparatus.

According to my invention extensible means are provided controlled by a movable compression'device or iston and controlling the valve mechanism fbr admitting and exhausting a motive medium to actuate such movable device of piston, whereby a long stroke is permitted of such movable device or piston with a simple construction of parts.

According to my invention such com ression device or piston is inclosed in a seale casing, and a pumping or feeding device is provided for supplying the motive medium to dynamic expanding means, such pumping device bepression device or piston and being'sealed with the compressor casing.

7 According to my invention a movable vane is interposed in the path of a medium flowing through a refrigerating apparatus and this movable vane controls an alarm apparatus so as to'actuate the same when the flow of medium is retarded, and retarding means are provided to limit the actuation of the alarm a paratus to'a sufficientl long continued ciiecking or stoppage of owto mdicate a substantial impairment of the apparatus.

I will now describe the construction of re frigerating ap aratus illustrated in the accompanying rawin s and embodying my invention and will t ereafter point out my invention in claims. a

Figure 1 is a sectional elevation of a complete refrigeratin apparatus. F1". 2 is an enlarged sectiona detail of a ortion of the pump for feeding the heating 0 amber. Fig.

'3 is an enlarged sectional detail of the valve Specification of Letters Patent. Application filed October 1. 1902. semi No. 125,546.

mg controlled by the movement of the com Patented Nov. 19, 1907.

mechanism.

on the line 4'-4 g. 3'.

The main parts of the apparatus comprise means for expanding a medium by the application of the heat thereto, shown as a eatingjchamber 1, means for compressing a portion of the medium by the expansive action of another portion of thBIYlGdlill'Il/SllOWIl as a compressor 2, means for abstracting heat from the compressed medium, shown as a 13%.} is a section of the same condenser 5, and means for utilizing the ex-, pansion of the condensed medium in the pro-, duction of a'refrigeratlve or cooling action,

shown as a refrigerator or'coolin chamber 6.

There are two closed cycles of circulation, one'the power cycle and the other the re frigerant cycle, both uniting in the common condenser 5. The power cycle is from the heating chamber 1 through the power feed conduit 3 to the power end of the compressor 2, under the control of the valve mechanism hereinafter described, thence through the exhaust conduit 4 to the condenser 5, thence through the-static column conduit 7 and pump feed conduit 8, and thence through the pump 9' to the heating chamber.

The refrigerant cycle is from the cooling chamber 6 through the compressor intake conduit 11 into the upper or compression end of the compressor 2 under the control of the intake valve 12 and out from the compressor cvlinder through the outlet valve 14, and through thecom ressor outlet conduit 16 to the exhaust con uit 4 of the ower cycle, to the condenser 5, and from t 1e condenser 5 through the static column conduit 7 to the float chamber 13, and from such chamber under the control of the expansion valve 19 back to the cooling chamber 6.

The application of heat to the heating chamber 1 is shownas accom lished by a gas burner 20, the gas supply 0 which is re u'" lated by a suitable e ectrically controlled valve 21, and a thermostatic controller is provided in proximity to the cooling chamber 6 and exposed to the temperature thereof, shown as consisting of a bimetallic strip 10 which acts to close the circuit of the valve 21 and thereby to restrict or shut off the supply of gas to the burner 20 when the temperature in the refrigerator 6 falls below the desired cooling temperature. The cir-' cuit controlled by this controller maybe traced as follows; from battery 15 by wire 17, contact 18, bimetallic strip 10, wire 28,

valve "21' and wire 69 back ,to battery. Other circuits are also rovided connected to this battery'and one oi the1n controlling the gas regulating valve as will be hereinafter de- 5 scribed.

. I provide means for regulating the supply of condensed or liquid medium to the heatmg' pump, this valve'29 being-located at the foot.

of the static (xilumn conduit 7. The pumping device comprises a pump plun er-31 fitted to slide in the base or lower hea 67 of the compressor and in a cylinder secured to such head and entirely inclosed within the plunger 3]. is normally sustained by a retracting spring 33 in such per end extends up into t 1e lower part of the piston chamber of the-compressor, sothat the compressor iston when it approaches the lower end 0 its stroke, will come in contact with and force downward this pump plunger, the return stroke of the pump plunger being made under the action 'of its retracting spring 33 as the compressor iston 30 rises. A spring actuated intake va ve 34 is rovidedior the pump cylinder. The c-ylim er of the pump 9 is provided with a water jacket 35 to maintain a low temperature therein so that the condensed medium which flows into the pump will not become expanded in the pump, as such expansion would impair the effectiveness of the pump ing action. The pum supply controlling valve 29 is held normally 0 mn by the spring 23 and is controlled by an electro-magnet 22, the armature of which is carried by the valve Q 29, and the circuit of the clectro-magnet 22 is opened and closed by the action of the liquid level float 26 above described. When the supply of liquid in the expansion chamber' rises above thenormal, the float 26 closes the circuit of .the .electro-magnet, 22 and this electro-magnet by attractingjts armature, closesthe valve 29 and thereby cuts off the supply of fluid to the pump, so that the pump will draw no fluid,- although tinued. When the liquid level in the heatingchamber 1 falls s11 htly below the nor.-

' mal', the circuit of the e ectro-magnet 22 will be opened and the electro-magnet will relhase its armature and permit the valve 29 to be opened by its spring 23 and the pump will thensupply liquid to the expansion chamelectrormag'net 22 and wire 66, back to bat ing shown asincluding a float 26 located in a sealed casing of the apparatus and this isition that its up-v 'ment I heating chamber 1. to the power chamber .of 125 her. The circuit of the electio magnet 22 may be traced from the battery 65'through wire 24, contacts of the'float device, wire 25,

terry.

, he compressor piston '30 is vertically arranged so that its -movement is with and against gravity, and "is ofsubstantial weight" and is actuated by gravity in performing its down stroke. The piston rod '36is extensible or telescopic and is shown as made of a plurality of sections arrangd'to open and close "telescopically'and to actuate the valve mechanism onlyiat the eggtreinities of the stroke of the piston, the lower section 37 of the telescopic piston rod being connected to the weighted valve actuatmg lever 38, this valve actuating lever being loosely mounted on the shaft-39 in unstable equilibrium so as to exert a substantial force by its own weight. When the iston approaches the upper'extremity of 1t! stroke the lower section 37 of its rod is pulled upwardly, thereby swinging the weighted lever over its center from the position shownrin Fig. 4, and after the center of gravityof the weighted lever has passed over its pivotal center, its own weight carries. it to the op osite extreme position, and it closes the in etvalve 40 and opens the exhaust valve 41. When the piston approaches the lower extremity ofits stroke, the up .1 end of the section 37 comes in contact wlth'the top of the pdcket in the piston and the weighted lever is actuated in the rev verse direction, toward the position shown in Fig. 4, and after the weighted lever has been moved suiiiciently to carry its center of gravity over its pivotal center, its own weight will carry it to the extreme position hown in F' I and closin the exhaust valve 41. The weighted ever 38 actuatea the valves through a motion transmitting means comprising a-sector 42, secured upon the shaft 39, and having contact pins 43 s aced apart so as to permit the Weighted ever to be moved over its center and to acquire inomeirtum before coming in contact with the pin which is interposed in its path The shaft 39 isalso provided with two cams ,44 and 45, the cam 44 being arranged to,co'act with the stem of the inlet valve 40. to open such valve and the cam 45 being arranged to coact with the stem of the exhaust valve 41 to open such valv'e, and the valves being 12o providedwith light springs tending to move .them toward their seats. the movement of 1178. piston 'may be con- For e purpose of' regulating the move- (i i the expanded medium from .the

t e compressor 2, I provide a restricted portion 46.1n the powerfeed conduit '3 so that violent action of the piston will be prevented,

and I provide the exhaust conduit 4 with a restricted portion 47 for-a like purpose.

1g.4, opening the inlet valve 40 105 Should the circulation of mediumin the apparatus become checked or choked'at any time b the clogging of an conduitwor part thereo the sup ly of re igerant medium 5 to the heating c hamber would be checked or stopped, but the diminutionin the effect-j iveness of the action would call for the ap-' lication of full heat to the heatihg'chamr. I rovide that in such a contin ency the supp of heatin medium will be reduced 1 or cut '0 andan a arm will be soundedto give notice of the impaired condition of the apparatus. The means provided to this end comprise a light'pivoted vane 48 located in the conduit 4' in proximity to the con denserv 5, this vane being located in an enlargement or chamber formed therein and arranged in front of the conduit opening so that the medium flowing through such conduit will flow a ainst such vaneand hold the vane back in the position shown. Should the flow of the refrigerant modiumbe checked, this vane will he moved by its spring 49 against the, mouth of the conduit and will make contact with a contact point .50 and will thereby close the circuit through the electro-magnet 51 to actuate an alarm appadraws and will also close a'eircuit through the gas supply valve 21 to restrictor shut oil" the suppl of gas to the biirner 20 of the heating cham er. r 1 l The circuit for the alarm controlling electro-magnet .51 and the valve 26 may be traced fromthe'battery 15 through wires 17 and 52, vane 48, point 50, wire 53, electro-magnet51, wires 54, 28, gas valve .21 andv wire 29, back to battery. In order that this circuit may not be closed b every trifling retardation of the flow of re igerant 40 medium, 1 supply a -dasht 55 and a plunger on the-vane 48 is a apted to enter u such dash pot before the contact 50 is closed, so that the resistance of this dash-pot will prevent the closi of the vane upon the contact unless t e stoppage of the movement ofthe refrigerant medium is extended over a substantialunterval oftime. -I also Q provide a dash-potin the alarm controlling apparatus, such dash-pot 56 controlling the 50 movement of the armature 57 of the alarm controlling electro-magnet 51-; When the v alarm controlling eleetro-magnet 51 is eire'rgized, itattracts its armature, but b reason of the dash-pot 56 the movement of t e armature is retarded so that its full movement is not completed unless the energization -of the alarm controlling magnet 51 1S maintained for a substantial period of time. When the -armature 57 completesits full movement 60. it closes a circuit through the contaet 58 of the alarm apparatus 59, such circuit bemg branch from the wire 52 of the circuit bovedescribed and flowing fromjthe'gwire I 52 through the ,wire 60, alarm a paratus 59 wire=61, contact 58, armature ever 57 and also dependent upon the maintenance of the contact ofv the vane 48 with-the point 50. Thus the sounding of'the alarm results only from a substantial im airment' of circulation maintained for sue a time as to make advisable the cutting off of the power supply and an inspection of the apparatus.

The ex ansion device for regulating the flow of re rigerant medium into the cooling chamber or refrigerator 6 comprises an exfioat chamber 13 is a pivoted float 63 which controls the movement .of the expansion valve *so'that the expansionvalve is only drum in thefloa't chamber to lift t e float. By this means the entrance of, unliquefied medium to the refrigerator is prevented. Further the expansion valve 19 is immersed 'at all times in liquid medium, both on the gelation or freezing at the'point of expansion is prevented by the constant presence of liquid medium at the point of expansion.

may be made'in the construction" shown in the drawings and above articularly described within the spirit an scope of my in? vention.

What I claim and desire to secure by Letters Patent is: 1 K A 1 1. Ina refrigerating a paratus, the combination with a source 0? motive medium'of a compressor having apiston and a sealed casing for the same, valve mechanism for admitting theJnotive medium to such casing to take and exhaust valves and cams arranged valves to move the valves and swinging tuating means and the valve mechanism and valve-actuating means being sealed in such being sealed in suchcasing.

pa'nding a motive medium, of a\ compressor .[t is obvious that various modifications actuate such piston and for exhausting the motive medium therefrom comprising incarns actuated by the piston, such cam-acsuch valve mechamsm from the piston, suc actuating means and the valve mechanism wire 62 back to the wire This circuit is pansion valve 19 located between the refrig- 1- erator 6 and the float chamber 13, and in the *o ened when there is sullicient li uid mefeed and expansion sides thereof, so that coni to co act with the respective stemsgofsuch 'weigpted levers to accelerate the movement of t e cams, and actuating-means for such.

having acnsing and a piston therein, and e l pandin means, and the dynamiceipanding 10 pump for feeding-the motivemedium to the means swing a sealed connection with the dynamic expanding'means, the pump having compressor casing. 9 v

a piston controlled by the compressor piston' I In testimony whereof I have affixed my fthrough am opening which forms a. sealed signature in presence of two w' ncsses.

commotion between the pump casing 'and compressor casing, and the pump casing also l having scaled connections with a source of motive medium and with the dynamic 'ex- &

CLYDE J. COLEMAN: Witnesses:

HENRY D. WILLIAMS, HERBE T H. GIBBS. 

